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Engine-Codes – Generic – P2021

P2021 Code - Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2

Quick Answer

The P2021 code indicates a problem with the Intake Manifold Runner Position Sensor or Switch Circuit on Bank 2. Common causes include Faulty Intake Manifold Runner Position Sensor/Switch, Wiring or connector issues in the sensor circuit, Vacuum leaks in the intake manifold. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2021 indicates Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2.
Common causes
Common causes include Faulty Intake Manifold Runner Position Sensor/Switch, Wiring or connector issues in the sensor circuit, Vacuum leaks in the intake manifold.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P2021 Description

The P2021 code indicates a problem with the Intake Manifold Runner Position Sensor or Switch Circuit on Bank 2. The intake manifold runner control system is responsible for optimizing air flow into the engine, improving performance and fuel efficiency. The sensor or switch in question helps monitor and adjust the position of the intake manifold runners, which control airflow depending on engine speed and load. When this sensor or switch circuit is reading a low voltage signal, it can lead to issues with fuel delivery, air-fuel ratio, and overall engine performance. If not addressed, it can result in poor acceleration, decreased fuel efficiency, rough idling, and potentially even engine misfires.

OBDII Code P2021 - Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
P2021 Code - Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2

Common Causes of P2021

  1. Faulty Intake Manifold Runner Position Sensor/Switch
  2. Wiring or connector issues in the sensor circuit
  3. Vacuum leaks in the intake manifold
  4. Carbon buildup in the intake manifold runners
  5. Issues with the Engine Control Module (ECM) or related components

Symptoms of P2021

  1. Poor acceleration or lack of power
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Engine misfires
  5. Check Engine Light illuminated on the dashboard

How to Fix P2021

  1. Perform a diagnostic scan to confirm the P2021 code and identify the exact cause of the issue.
  2. Inspect the intake manifold runner position sensor and switch for any signs of damage or malfunction.
  3. Check the wiring and connectors for any breaks, corrosion, or loose connections.
  4. Clean the intake manifold runners to remove any carbon buildup that could be affecting sensor readings.
  5. Replace the faulty sensor or switch if necessary, and reset the Engine Control Module to clear the code.

Cost to Fix P2021

The cost of repairing the Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2 issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the cost of parts for this repair can range from $100 to $300, while labor costs can add another $100 to $200. Overall, you can expect to pay between $200 and $500 for this repair at an auto repair shop. It's always recommended to get a few quotes from different shops to compare prices and ensure you're getting a fair deal.

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Code P2021 Information for Specific Makes

  • P2021 Chrysler — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Dodge — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Ford — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Jeep — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Lincoln — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Mercury — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2021 Subaru — Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2021 Code

1. What are common symptoms of OBDII code P2021 (Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2)?

- Common symptoms include reduced engine performance, rough idling, lack of power, and illuminated check engine light.

2. What causes OBDII code P2021 to trigger?

- The code P2021 is typically triggered by a faulty intake manifold runner position sensor/switch, damaged wiring, or a poor electrical connection.

3. How can I diagnose the cause of OBDII code P2021?

- To diagnose the issue, you can use a scan tool to check for the code, visually inspect the wiring and connectors, test the intake manifold runner position sensor, and perform a circuit check.

4. Can a dirty intake manifold cause OBDII code P2021?

- While a dirty intake manifold may not directly cause P2021, it can contribute to intake system issues that may lead to sensor malfunctions triggering the code.

5. What are the repair options for OBDII code P2021?

- Repair options include replacing the intake manifold runner position sensor/switch, repairing or replacing damaged wiring, ensuring proper electrical connections, and cleaning the intake system if needed.

6. Is it safe to continue driving with OBDII code P2021 present?

- It is generally not recommended to continue driving with the code present as it can lead to further engine issues and potential damage if left unresolved.

7. Can resetting the OBDII code P2021 clear the issue permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

8. How much does it typically cost to repair OBDII code P2021?

- The cost of repairing P2021 can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast repair OBDII code P2021 at home?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address the issue themselves by following repair guides and using proper diagnostic equipment.

10. How often does OBDII code P2021 occur in vehicles?

- OBDII code P2021 related to the intake manifold runner position sensor/switch circuit low in bank 2 is a relatively common issue in vehicles with variable intake systems, particularly in older models or those with high mileage.

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